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| Patent # | Description |
|---|---|
| US-5,781,300 |
Backscatter error reducer for interferometric fiber optic gyroscope A backscatter or secondary wave error reducer for an interferometric fiber optic gyroscope having at least one phase modulator for receiving a square wave bias... |
| US-5,781,299 |
Determining the complex refractive index phase offset in interferometric
flying height testing An apparatus and method for optically measuring the air gap between a transparent glass disk and an air bearing slider without separately measuring the real... |
| US-5,781,298 |
Light mixing technique for isolation and amplification of laser signal
from background noise due to scattering... A coherent light beam is split to form optical signals that follow separate ptical paths to a light beam combiner. One optical signal is frequency modulated... |
| US-5,781,297 |
Mixed frequency and amplitude modulated fiber optic heterodyne
interferometer for distance measurement A method and an apparatus for a precision optical distance measuring device which can be used to determine both external and internal target geometries. The beam... |
| US-5,781,296 |
Closed loop type fiber optic gyroscope for measuring absolute rotation
by delta serrodyne wave phase modulation A fiber optic gyro can overcome the defects encountered with conventional fiber optic gyros of phase-modulation method, closed-loop system with serrodyne... |
| US-5,781,295 |
Interferometer for absolute distance measurement An interferometer for absolute distance measurement with two lasers, one of which is tunable with respect to frequency. A device for collinear superposition of... |
| US-5,781,294 |
Method and apparatus for detecting photoacoustic signal to detect
surface and subsurface information of the... A method and an apparatus for detecting a photoacoustic signal are provided which irradiate an excitation light beam, modulated by a desired frequency,... |
| US-5,781,293 |
Fourier transform spectrometer utilizing a birefringent optical component A Fourier-transform spectrometer contains a birefringent optical component, removing the need for a Michelson interferometer used in conventional instruments. A... |
| US-5,781,292 |
Short path scanning interferometer A short path scanning interferometer comprising a base forming an interior, and first and second optical members located in the interior of the base. The... |
| US-5,781,291 |
Smoke detectors utilizing a hydrophilic substance A smoke detector incorporates a porous plastic material which carries a hydrophilic agent alone or in combination with a surfactant which can be sprayed or... |
| US-5,781,290 |
Spectral apparatus of the concentric type having a fery prism The conventional grating is substituted by one or more curved prisms in a concentric spectrometer of the type derived from the Offner mirror objective. The... |
| US-5,781,289 |
Method and apparatus for rapid in situ analysis of preselected
components of homogeneous solid compositions,... A method and apparatus for rapid in-situ spectroscopic analysis of preselected components of homogeneous solid chemical compositions, especially pharmaceutical... |
| US-5,781,288 |
Method of inspecting location of optical film and system for carrying
out the method A method of inspecting the location of a polarization-direction changing film relative to a transparent plate at a predetermined position. The method comprises... |
| US-5,781,287 |
Coil body for miniature relays and the like A coil body consists of a coil tube having flanges integrally formed onto the ends and having an axially through-extending opening. This core opening is formed... |
| US-5,781,286 |
Method and apparatus for measurement of axle and wheel positions of
motor vehicles A method and an apparatus for measuring the wheel positions of double-track motor vehicles according to which the relevant wheel angles, such as the track, the... |
| US-5,781,285 |
Method and apparatus for monitoring presence and direction of light in
optical fibers Apparatus and method of determining presence or absence of light activity in an optical fiber without separation or disconnection thereof from other fibers or... |
| US-5,781,284 |
System for detecting impurities contained in a fluid medium A method and apparatus for determining the types and amounts of impurities contained in a fluid medium wherein light is projected into a fluid medium and light... |
| US-5,781,283 |
Process and arrangement for the measurement of physical values of light
scattering moving particles by means of... A process is provided for measuring physical values of light-scattering moving particles by means of laser Doppler anemometry and to a corresponding laser... |
| US-5,781,282 |
Distance measurement device A distance measurement device is provided which determines the measurement zone of an object and also determines the direction of movement of the object within... |
| US-5,781,281 |
Distance measuring infrared projection system In a finder lens system having a zooming function, a distance measuring infrared projection system having its own zooming function is disposed such that the beam... |
| US-5,781,278 |
Projection optical system and exposure apparatus with the same The present invention relates to a both-side telecentric projection optical system and an exposure apparatus equipped with this projection optical system. In... |
| US-5,781,277 |
Projection exposure apparatus and exposure method and semiconductor
device production method therewith A projection exposure apparatus includes a reticle stage for moving a reticle, a wafer stage for moving a wafer, a projection optical system for projecting a... |
| US-5,781,276 |
Printing of color film An exposure of a color film is scanned at a multiplicity of points in each of the primary colors. The color compositions of the points are evaluated to identify... |
| US-5,781,275 |
Eye refractometer and eye refractive power measuring apparatus for
electro-optically measuring the refractive... An eye refractometer includes a beam splitter arranged in front of an eye to be examined for splitting an optical path from the eye to be examined into an... |
| US-5,781,274 |
Device for exercising the ciliary muscle This relates to a device to be located in front of one eye or both, eyes to exercise the ciliary muscle. A plurality of light sources are disposed and mounted on... |
| US-5,781,273 |
Retainer system for replacing existing eyeglass temples An eyewear retainer to be attached to the forward lens carrying frame of a pair of eyeglasses in substitution for the usual temples. The retainer has two... |
| US-5,781,272 |
Eyesight protection apparatus with attached earplugs An eyesight and hearing safety apparatus for use by a human being. The apparatus comprises a front guard portion including a front transparent panel for... |
| US-5,781,271 |
Portable safety sideshields for eye glasses Low cost and portable safety side shields for safety eye glasses which substantially protect eyes from harm caused by projectiles impacting the eye through open... |
| US-5,781,270 |
Frame for spectacles without surround The frame for spectacles without surround comprises: a pair of arms (3); for each arm, an element (7) for connection to the respective lens (L); an intermediate... |
| US-5,781,269 |
Distance measuring method and distance sensor A light having a single wavelength which is emitted from a light emitting element comprising a light emitting diode, a semiconductor laser or the like is changed... |
| US-5,781,268 |
Polarization-insensitive fabry-perot tunable filter This invention provides polarization-independent optical filters that are Fabry-Perot filters. The inventive filters incorporate a phase modulator within the FP... |
| US-5,781,267 |
Anti-ferroelectric liquid crystal with black display in one frame, white
in other and ratio giving grey scale The present invention provides a spatial light modulator comprising a photoconductor having a current rectifying function and a liquid crystal layer having an... |
| US-5,781,266 |
Ferroelectric liquid crystal display device and method for producing the
same A ferroelectric liquid crystal display device of the present invention includes: a pair of substrates; a ferroelectric liquid crystal layer provided between the... |
| US-5,781,265 |
Non-chiral smectic C liquid crystal display A liquid crystal display according to this invention has a pair of transparent electrodes, a non-chiral smectic liquid crystal therebetween, a polarizer and an... |
| US-5,781,264 |
Liquid crystal display device A liquid crystal display device comprising a multilayer printed wiring board having an insulation layer of glass fiber woven fabric impregnated with a resin and... |
| US-5,781,263 |
Liquid crystal display device wherein driving frequency is 200 or less
and 50% threshold voltage is 1.5 V or less A liquid crystal display device permitting low voltage driving which presents good display quality for a long time and excellent characteristics in low power... |
| US-5,781,262 |
Liquid crystal display cell Liquid crystal display (LCD) has sub-pixel domains within each pixel to obtain a wide viewing angle. The sub-pixel domains are formed by divided orientation... |
| US-5,781,261 |
Active matrix type LCD having light shield layers and counter electrodes
made of the same material An active matrix type liquid crystal display comprising a liquid crystal layer containing liquid crystal molecules, a pair of substrates arranged to be facing... |
| US-5,781,260 |
Liquid crystal display device having light shading film On one of a pair of substrates sandwiching a liquid crystal, a pair of signal lines, a pair of scanning lines intersecting these signal lines at right angles, a... |
| US-5,781,259 |
Liquid crystal display apparatus A liquid crystal display apparatus comprising a pair of transparent substrates which consists of a driving side substrate and an opposite side substrate;... |
| US-5,781,258 |
Assembling and sealing large, hermetic and semi-hermetic, h-tiled,
flat-paneled displays The present invention features flat-panel displays having a mosaic of tiles, and methods of constructing and sealing them. Sealing designs are described to... |
| US-5,781,257 |
Flat panel display A flat panel display incorporates an array of color separation microlenses. Each color separation microlens in the array is a single, micro-optical element which... |
| US-5,781,256 |
Nonlinear resistance element and fabrication method thereof in which
tungsten atoms are distributed... The method of fabricating a nonlinear resistance element includes the steps of: forming on a substrate a first conductive film having tantalum as a main... |
| US-5,781,255 |
Active matrix display device using aluminum alloy in scanning signal
line or video signal line An anodized oxide film of Al is formed on a scanning signal line and a gate electrode. Al--Ta is used as material of each of the scanning signal line and gate... |
| US-5,781,254 |
Active matrix LCD having a non-conductive light shield layer A liquid crystal display having a top plate and a bottom plate. The bottom plate includes a plurality of gate bus lines and a plurality of drain bus line... |
| US-5,781,253 |
Liquid crystal display having electrostatic discharge protection and
method for manufacturing the same A liquid crystal display, and its manufacturing process, are provided in which antistatic measures are taken in the manufacturing process to prevent the... |
| US-5,781,252 |
Dual light valve color projector system The present invention relates to a light valve projector in which a pair of high resolution active matrix transmission displays are used with a light source,... |
| US-5,781,251 |
Method and apparatus for optical scanning for single panel color
projection video display A method and apparatus for a single panel projector, for projecting images having a plurality of color components, include a mechanism for deflecting light into... |
| US-5,781,250 |
Input signal switching circuit of a monitor and switching method thereof An automatic input signal switching circuit of a monitor having a BNC (binary number code) signal terminal and a D-sub (D type-sub miniature connector) signal... |
| US-5,781,249 |
Full or partial search block matching dependent on candidate vector
prediction distortion A motion vector detecting method determines a motion vector of a search block included in a search frame of a video signal by using motion vectors of processed... |
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